Astronomy and Astrophysics – Astrophysics – Galaxy Astrophysics
Scientific paper
2012-02-27
Astronomy and Astrophysics
Astrophysics
Galaxy Astrophysics
14 pages, 15 figures, Accepted for publication in A&A
Scientific paper
The detailed structure of the Galactic bulge still remain uncertain. The strong difficulties of obtaining observations of stars in the Galactic bulge have hindered the acquisition of a kinematic representation for the inner kpc of the Milky Way. The observation of the 3-d kinematics in several low foreground extinction windows can solve this problem. We have developed a new technique, which combines precise stellar HST positions and proper motions with integral field spectroscopy, in order to obtain reliable 3-d stellar kinematics in crowded fields of the Galactic center. In addition, we present results using the new techniques for six fields in our project. A significant vertex deviation has been found in some of the fields in agreement with previous determinations. This result confirms the presence of a stellar bar in the Galactic bulge.
Kuijken Koen
Rich Robert Michael
Soto Mario
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